Alfred cooper drury



(NoModeL) a A. G. DRURY.

I SEWER TRAP. I No. 452,750. Patented May 19, 1891.

UNITED STATES PATENT OFFICE.

ALFRED COOPER DRURY, OF CANTON, NEIV YORK, ASSIGNOR OF ONE-HALF TOMURRAY N. RALPH, OF SAME PLACE.

SEWER-TRAP.

SPECIFICATION forming part of Letters Patent No. 452,750, dated May 19,1891.

Application filed August 22, 1890. Serial No. 362,750. (No model.)

To all whom it 77mg concern.-

Be it known that I, ALFRED COOPER DRURY, a citizen of theUnited States,residing at Canton, in the county of St. Lawrence and State of New York,have invented a new and useful Sewer-Trap, of which the'following is aspecification.

This invention relates to sewer-traps; and it has for its object toconstructacontrivance to of this class which shall effectually preventthe escape of sewer-gas into the plumbing fixtures of the building orstructure to which it may be applied, and which shall, further-. more,prevent water from backing up into the drain-pipes.

The invention consists in the improved construction and arrangement ofparts, which will be hereinafter fully described, and particularlypointed out in the claim.

In the drawings hereto annexed, Figure 1 represents a vertical sectionalview of a sewertrap constructed in accordance with my invention. Fig. 2is a perspective detail view showing the valve-casing removed.

Like numerals of reference indicate like parts in both figures.

1 designates the street-main, and 2 is the house-drain. These pipes areprovided at their meeting ends with flanges, designated,

0 respectively, by and at, to receive the connecting-bolts 5. a

6 designates the valve-casing, which is approximately cylindrical inshape and which is inserted into the street-main, as shown, 3 5 saidvalve-casing being provided with an annular flange 7, which is mountedbetween the flanges 3 and 4 and secured by the bolts 5. Packing 8, ofrubber or other suitable material, is interposed between the flanges 3,4, and,7,in order to make perfectly-tight joints. The valve-casing 6 ismade smaller in diameter than the interior diameter of the pipe 1, inwhich it is fitted. The inner end of said valve-casing is inclined oroblique and is provided at its lower edge wit-h a lip 9, resting uponthe bottom of the pipe 1. At its upper edge the inner end of thevalve-casing is provided with the inclined top piece 10, having asuitably-constructed hinge 11, to which the gate or valve 12 is suitablyconnected. The pipe 1 may be provided directly above the valve with anupwardly-extendingbranch 13,

having a flange 14:, to which a ventilatingpipe may be connected butwhen the valve and fixtures are properly made the joint will be soperfect that such ventilating-pipe may be very readily dispensed with.

The operation of my invention and its advantages will be readilyunderstood from the foregoing description, taken in connection with thedrawings hereto annexed. The trap may be easily applied to plumbingfixtures of ordinary construction without necessitating expensivechanges of any kind. The gate or valve opening outwardly will readilyadmit of the passage of the waste water into the sewer, but willinstantly and automatically close to prevent the passage of backwater orsewer-gas. The lip 9 at the inner end of the valve-casing affords aperfect seat and ample bearing for the lower edge of the gate, and thereis no danger of its ever being clogged with impurities of any kind. Thejoints between the parts of the device are simple and effective and ofsuch a nature as to afford ready access to the valve-casing, if foranyreason this should become necessary. The inclined top flange 1,0 atthe inner end of the valve-casing forms aconvenient means for theattachment of the valve or gate, and 8c the general structure of thedevice is simple and inexpensive.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is-

In a sewer-trap, the combination, with the street-pipe having the flange3, of the valve casing mounted in said street-pipe and provided at itsinner end with a downwardlyextending lip 9 and with an inclined topflange 10, and at its outer end with a flange 7, the valve or gate 12,hinged to the top flange 10 and having a seat upon the lip 9, the housedrain-pipe 2, having flange 4, and the packing and connecting bolts, allan 5 ranged and operating as and for the purpose set forth.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in presence of two witnesses.

ALFRED COOPER DRURY.

Witnesses:

J. E. J OHNSON, J. H. W. HAMMOND.

